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Accounts at the firm Walker and Walker believed that several traveling executives submit unusually high travel vouchers when they return from business trips. The accountants took a sample of 200 vouchers submitted from the past year; they then developed the following multiple regression equation relating expected travel cost (Y) number of days, (Y (x1) ) number of days on the road and distance traveled (X2). Y=$90.00 + $48.50x1 + $0.40X2 The coefficient of correlation computed was 0.68.
At significance levels of .05 and .01 test H 0 : the factors A and B are independent.
Suppose that $532,000 is to be allocated for advertising, research, and investment in the ratio 8:7:4. How much money will be allocated for each?
For following scores determine values of each expression: X: 4, 2, 1, & 5. åX, åX 2 , (åX) 2 , å(X-1).
Fresh fruit prices and quantity data for years 1988 to 2001 follow (Statistical Abstract of United States, 2002). Quantity data reflect per capita consumption in pounds and prices are per pound.
Given that x and y are both positive, solve the simultaneous equations.
The GMAT scores of MBA students is assumed to be distributed normally with a mean of 530 and a standard deviation of 80. The GMAT scores of ten students are selected randomly.
What contingency table test is used to see if there is a difference in the frequency distribution for two different groups?
A drug manufacturer wants to estimate the effect of its new drug designed to increase patients white blood cell count.
A marketing survey is taken among fast food customers to determine their preference for hot dogs or pizza. Of the 200 respondents selected,
Determine the standard error of estimate. Suppose a large sample is selected (instead of just five). About 68 percent of the predictions would be between what two values?
A student team in a business statistics course performed a factorial experiment to investigate the time required for pain-relief tablets to dissolver in a glass of water.
1- ounce chocolate chip cookies resulted in following calorie amounts. At α=0.01 level, is there sufficient evidence that average calorie content is greater than 110 calories.
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